Don't replace the clutch if the slave isn't showing adequate travel. That's an issue apart from the clutch.
You might get more travel by extending the adjuster rod at the pedal.
When I was dealing with a slave that would not travel enough, I extended the adjuster rod at the pedal but that still was not enough to get full clutch disengagement and I hacked a solution by putting a big headed roof tack in the clutch lever cup so that there was earlier engagement of the slave rod. These steps only gave me a touch more clutch disengagement. The problem was in the master. It was not pushing enough fluid in its travel.
The hacks worked until I was able to get the master and slave replaced. I shortend back the pedal adjuster rod with all the new travel and all was good.
Look over everything for issues, and consider doing another round of bleeding the fluid. Since you have flex line, pull it out and give it a proper bleed.
Jay Johnson